公开(公告)号：US06763374B1

公开(公告)日：2004-07-13

申请号：US09510023

申请日：2000-02-22

Applicant: Steven P. Levi ,  Mark D. VanAntwerp ,  Craig M. Dowell ,  Chadd B. Knowlton

Inventor： Steven P. Levi ,  Mark D. VanAntwerp ,  Craig M. Dowell ,  Chadd B. Knowlton

IPC: G06F1516

CPC classification number: H04L65/607 ,  H04L29/06 ,  H04L29/06027 ,  H04L69/324 ,  H04L69/326 ,  H04N7/52

Abstract: An active stream format is defined and adopted for a logical structure that encapsulates multiple data streams. The data streams may be of different media. The data of the data streams is partitioned into packets that are suitable for transmission over a transport medium. The packets may include error correcting information. The packets may also include clock licenses for dictating the advancement of a clock when the data streams are rendered. The format of ASF facilitates flexibility and choice of packet size and in specifying maximum bit rate at which data may be rendered. Error concealment strategies may be employed in the packetization of data to distribute portions of samples to multiple packets. Property information may be replicated and stored in separate packets to enhance its error tolerance. The format facilitates dynamic definition of media types and the packetization of data in such dynamically defined data types within the format.

Abstract translation: 为封装多个数据流的逻辑结构定义并采用活动流格式。 数据流可以是不同的媒体。 数据流的数据被分割成适合于在传输介质上传输的分组。 分组可以包括纠错信息。 分组还可以包括用于指示在呈现数据流时提前时钟的时钟许可。 ASF的格式有助于数据包大小的灵活性和选择，并指定可以呈现数据的最大比特率。 错误隐藏策略可以用于数据分组化以将样本的部分分发到多个分组。 可以将属性信息复制并存储在单独的数据包中，以增强其容错能力。 该格式有助于媒体类型的动态定义以及在格式内的动态定义的数据类型中数据的分组化。

公开(公告)号：US6118790A

公开(公告)日：2000-09-12

申请号：US667095

申请日：1996-06-19

Applicant: William J. Bolosky ,  Steven P. Levi ,  Mark D. VanAntwerp ,  Yoram Bernet

Inventor： William J. Bolosky ,  Steven P. Levi ,  Mark D. VanAntwerp ,  Yoram Bernet

IPC: H04L29/08 ,  H04L29/06 ,  H04N7/173 ,  H04J3/16

CPC classification number: H04L65/80 ,  H04L29/06 ,  H04N7/17336 ,  H04L29/06027

Abstract: An audio server system is provided that sends audio sequences or mixed audio and still-picture sequences to subscribers at their request. To be used as an audio server system in the Internet environment, the audio server system must overcome the Internet's excessive loss of packets. The audio server system overcomes this problem by allowing for pre-specified packet sizes and pre-specified data rates. By allowing for pre-specified packet sizes, the audio server system can utilize an error correction scheme, such as parity encoding, so as to reduce the effects of the Internet's excessive loss of packets. Pre-specified data rates are provided by the audio server system so as to ensure that audio sequences or mixed audio sequences are not played faster than intended, which may lead to an increase in system data loss.

Abstract translation: 提供了一种音频服务器系统，其在请求时向用户发送音频序列或混合音频和静态图像序列。 为了在互联网环境中用作音频服务器系统，音频服务器系统必须克服互联网过多的数据包丢失。 音频服务器系统通过允许预先指定的包大小和预先指定的数据速率克服了这个问题。 通过允许预先指定的分组大小，音频服务器系统可以利用诸如奇偶编码的纠错方案，以便减少因特网过度丢失分组的影响。 预先指定的数据速率由音频服务器系统提供，以确保音频序列或混合音频序列的播放速度比预期的要快，这可能导致系统数据丢失的增加。